A low-sulfur nickel-cobalt-manganese ternary precursor, a preparation method and application thereof

By dividing the co-precipitation process into isothermal, heating, and cooling stages, and using alkanolamine surfactants and reducing agents, the problem of reducing sulfur content in nickel-cobalt-manganese ternary precursors was solved, enabling the preparation of low-sulfur and high-performance cathode materials and simplifying the production process.

CN122102232APending Publication Date: 2026-05-29JINGMEN GEM NEW MATERIAL CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
JINGMEN GEM NEW MATERIAL CO LTD
Filing Date
2026-02-28
Publication Date
2026-05-29

AI Technical Summary

Technical Problem

In existing technologies, it is difficult to effectively reduce the sulfur content of nickel-cobalt-manganese ternary precursors during the preparation process, which leads to an increase in side reactions during the high-temperature sintering of the cathode material, affecting the cycle performance and safety of the battery. At the same time, repeated washing increases costs and damages particle morphology.

Method used

The coprecipitation process is divided into three stages: isothermal, heating, and cooling. By controlling the temperature change and adding alkanolamine surfactants and reducing agents, well-structured and dense crystal nuclei are formed, inhibiting the insertion and adsorption of sulfate ions and optimizing the crystal structure.

Benefits of technology

It significantly reduces the sulfur content in the precursor, improves tap density and structural uniformity, simplifies the washing process, reduces production costs, and lays the foundation for the preparation of high-performance ternary cathode materials.

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Abstract

The application provides a low-sulfur nickel-cobalt-manganese ternary precursor and a preparation method and application thereof. The preparation method of the low-sulfur nickel-cobalt-manganese ternary precursor comprises the following steps: adding a nickel-cobalt-manganese mixed salt solution, a precipitant solution and a complexing agent solution into a bottom solution, and performing a coprecipitation reaction to obtain a low-sulfur nickel-cobalt-manganese ternary precursor. The coprecipitation reaction process comprises a constant-temperature stage, a temperature-increasing stage and a temperature-decreasing stage which are sequentially performed. The temperature control strategy provided by the application significantly reduces the solidification and wrapping of the precursor particles on sulfate ions, fundamentally solves the problem that the sulfur impurities are difficult to remove by washing, effectively reduces the sulfur content in the precursor, improves the tap density and structural uniformity of the precursor, lays a foundation for the subsequent preparation of high-performance ternary positive electrode materials, greatly simplifies the washing process and reduces the production cost.
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